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Turn computer over you will see 3 removeable panels not sure wich panel its under so look care fully for a watch type battery make sure its not the type thats soldered in acer dont usually do this. remove battery very carfully use plastic tweezers then buy new battery, size and type on battery. any retail shop that sells battery. then replace. hope this helps.
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You need to change the battery (normally a CR-2032 - which is available everywhere).
Unplug the computer, remove the cover, and set it down with the motherboard facing up. Look in the corners for a battery holder and the battery (it may be under a PCI card - which you will have to remove before changing the battery). When you locate the battery, very carefully remove it and replace it with the new battery. Replace all parts (seating the boards correctly) and button up you computer. Re-install the cables and turn it on.
The CMOS battery is responsible for the internal clock. If it automatically resets itself to 2002 (motherboard manufacturing date) then you need to have it replaced (it's really cheap to have it replaced).
You really need a service manual to try & locate the CMOS battery. With laptops the CMOS battery can be different on each model. These are often located on the motherboard below the keyboard, but a service manual should help you.
The CMOS battery is located on the motherboard. You would almost have to take the complete thing apart before you find it. You would be better off downloading password recovery software like OphCrack. It's free as an .iso file so you would just burn it to a disc and it will find the password for you.
OPEN THE CASE A REMOVE THE CMOS BATTERY FOR 3-5 MINUTES THAT SHOULD RESET THE CMOS TO DEFAULT SETTINGS. OR GO INTO THE BIOS AND SET TO DEFAULT SET UP.OR DEFAULT SETTING AND REBOOT.YOU MAY ALSO HAVE A CMOS RESET JUMPER.CHECK MANUAL FOR MOTHERBOARD.AND FOLLOW THOSE DIRECTIONS.RICHARDM69
if the clock is consistently being resetted then most likely you have a failing cmos battery. you need to dismantle the laptop in order to have access to the cmos battery. you need to fina a COIN type battery.
Is your laptop still under warranty? I would go to the manufacturer first if it is. If not: the system clock is run by the CMOS battery. When low will cause a host of problems. Change it and let me know if this fixes your problem.
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